let's go to jim cavanaugh right now. maybe i think like a cop but i'm thinking monday night they could have had plane tickets to be out of the country, middle east, driven to the canadian border, been to new york by monday at midnight. there's so many possibilities of where they've gone. what does it tell you that the fbi gave up trying to find them on their own? >> they made the right decision, the task force did to release them. you always want to be able to identify them yourself because then you can put them under surveillance, see their behavior, and make their move when you want to. that's what we all prefer in law enforcement. in law enforcement, we don't want to tell anybody anything. that's not the way it can work. and you're exactly right. mike isikoff, who i think is always right, you're exactly right about coming and going. look, if these were foreign nationals, they could have come in to watch the marathon or even if they were domestic perpetrators, they could have come in to watch the marathon for two, thre